ELSA LANCOM Wireless L-II, Руководство пользователя

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Operating modes and functions
51
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ELSA LANCOM Wireless L-II
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EN
under the
/Setup/WAN-module/Security
menu. You have a
choice of the following:
All calls are accepted from any remote station.
Name: Only calls from those remote stations entered in the name list are
accepted.
Number: Only calls from those remote stations entered in the number list
are accepted.
Name or number: Only calls from those remote stations entered in the
name list
or number list are accepted.
It is an obvious requirement for identification that the corresponding
information is also sent by the caller.
The hiding place – IP masquerading (NAT, PAT)
This section is only relevant for devices with DSL firmware!!
But this provokes objections from the network manager responsible for the
security of data on the company's network: Every workstation computer on
the WWW? Surely this means that anyone can get in from outside? – Not
true!
IP masquerading provides a hiding place for every computer while connected
with the Internet. Only the router module of the unit and its IP address are
visible on the Internet. The computers in the LAN then use the router as a
gateway so that they themselves cannot be detected. To do this, the router
separates Internet and intranet, as if by a wall. Therefore, IP masquerading
is also called a “firewall function“.
For further information, see the 'IP routing: IP masquerading' section.
4.3 Call charge management
This section is only relevant for devices with DSL firmware!!
The capability of the router to automatically establish connections to all
required remote stations and close them again when no longer required
provides users with extremely convenient access to the Internet, for example.
However, quite substantial costs may be incurred by data transfer over paid
lines if the router is not configured properly (e.g. in the filter configuration) or
by excessive use of the communications opportunities (e.g. extended surfing
in the Internet).
100235 Wireless L-11.book Seite 51 Montag, 30. Oktober 2000 5:43 17